76 



APPENDIX. 



Long. .20 



Lat. .16 inch. 

 " 4 mill. 



Hah. North America, Canoe Creek in California. 

 Smithsonian Institution and Prime.) 



(Cabinets of the 



Remarkable for its spherical and flattened appearance ; it is 

 unlike any other species indigenous or foreign. 



15." Pisidium consangilineum, Prime. — Testa minuta, trans- 

 versa, rotundato-ovata, insequilaterali, compressiuscula ; mar- 

 ginibus rotundatis ; tenuissime striata ; umbonibus tumidi- 

 usculis. 



Shell small, transverse, rounded-oval, inequilateral, not 

 much inflated ; margins rounded ; beaks somewhat apiculated ; 

 striae very delicate ; epidermis light horn color ; teeth robust. 

 Long. .16; Lat. .12; Diam. .12 inch. 

 4; " 3; " 3 milL 



Hah. Eetiro, Monte Verde and Catalina da Guarra, Cuba, West Indies 

 {fide Wright). (Cabinet of Smithsonian Institution, Wright, Wheatley, 

 and Prime.) 



Yery closely allied to Pisid. abditum, from which it is very 

 difficult to distinguish it. 



